Objective:To determine the effect of weekly low-dose vitamin A supplementation on cause-specific mortality in women of reproductive age in Ghana. Methods: A cluster-randomized; triple-blind; placebo-controlled trial was conducted in seven districts of the Brong Ahafo region of Ghana. Women aged 15-45 years who were capable of giving informed consent and intended to live in the trial area for at least 3 months were enrolled and randomly assigned; according to their cluster of residence; to receive oral vitamin A (7500 ?g) or placebo once a week. Randomization was blocked; with two clusters in each fieldwork area allocated to vitamin A and two to placebo. Every 4 weeks; fieldworkers distributed capsules and collected data during home visits. Verbal autopsies were conducted by field supervisors and reviewed by physicians; who assigned a cause of death. Cause-specific mortality rates in both arms were compared by means of random-effects Poisson regression models to allow for the cluster randomization. Analysis was by intention-to-treat; based on cluster of residence; with women eligible for inclusion once they had consistently received the supplement or placebo capsules for 6 months. Findings The analysis was based on 581 870 woman-years and 2624 deaths. Cause-specific mortality rates were found to be similar in the two study arms.Conclusion: Low-dose vitamin A supplements administered weekly are of no benefit in programmes to reduce mortality in women of childbearing age.

Objective:To determine the effect of weekly low-dose vitamin A supplementation on cause-specific mortality in women of reproductive age in Ghana. Methods: A cluster-randomized; triple-blind; placebo-controlled trial was conducted in seven districts of the Brong Ahafo region of Ghana. Women aged 15-45 years who were capable of giving informed consent and intended to live in the trial area for at least 3 months were enrolled and randomly assigned; according to their cluster of residence; to receive oral vitamin A (7500 ?g) or placebo once a week. Randomization was blocked; with two clusters in each fieldwork area allocated to vitamin A and two to placebo. Every 4 weeks; fieldworkers distributed capsules and collected data during home visits. Verbal autopsies were conducted by field supervisors and reviewed by physicians; who assigned a cause of death. Cause-specific mortality rates in both arms were compared by means of random-effects Poisson regression models to allow for the cluster randomization. Analysis was by intention-to-treat; based on cluster of residence; with women eligible for inclusion once they had consistently received the supplement or placebo capsules for 6 months. Findings The analysis was based on 581 870 woman-years and 2624 deaths. Cause-specific mortality rates were found to be similar in the two study arms.Conclusion: Low-dose vitamin A supplements administered weekly are of no benefit in programmes to reduce mortality in women of childbearing age.